UI Theme system refactored. New Biome-inspired UI themes: DesertTemple, EndCity, ForestMansion, NetherFortress, OceanMonument, Stronghold, and an updated version of Purist. Old Victorian theme removed and is no longer supported.

New Fullscreen map Feature: "Cave Layers" let you choose which vertical chunk of caves to view.

Fullscreen map shows biome name under mouse in Singleplayer, even for unloaded chunks

Fullscreen map has a new "Show Keys" button to let you see applicable keybindings.

Fullscreen map toolbars and layout have changed. The "Actions" button and dialog have been replaced with buttons for each action.

Fullscreen map has new "Chat Position" keybinding. The block position under the mouse will be put into chat.